NTRI 2000 Lecture Notes - Lecture 7: Body Mass Index, White Adipose Tissue, Brown Adipose Tissue
Document Summary
Obesity: currently nearly 2/3 of all north americans adults are overweight or obese. Successful weight loss comes form a change in lifestyle. Energy balance: energy in= energy out b. If energy in > energy out (positive energy balance); body weight (fat) will increase. If energy in < energy out (negative energy balance); body weight will decrease c. Energy in: energy in= calories consumed (actually calories metabolized, calories in a food can be determined by an instrument called a bomb calorimeter. Energy out (energy expenditure: basal metabolic rate (bmr) energy it takes to be alive, physical activity, thermic effect of food, adaptive thermogenesis. Basal metabolic rate (bmr: bmr- represents minimum amount of calories expended in a fasting state. 70 percent of total energy expenditure: 1. 0 kcal/kg for men, 0. 9 kcal/kg for women is used as an estimate c. this is hard to measure experimentally. In reality we measure resting metabolic ate (rmr)
